Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c39824539d4c37…

MALICIOUS

PDF

44.0 KB Created: 2020-08-22 16:37:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ca7b7dd3fcc917436ae857a6fb96cff6 SHA-1: 5b7cad8bc1bae4932d6870f68cbcd1404ec736fb SHA-256: a0c39824539d4c37300cf63b6e6b6bf8080ef89f423ebb6305764b51f86fe782
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, including a primary redirector to 'ttraff.com' which is known malicious infrastructure. The presence of numerous links to external PDFs hosted on various domains suggests a broad distribution or SEO poisoning attempt to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=microsoft+word+brochure+template In PDF document text
    • http://faxuxug.soduparentsposse.com/uploads/1/3/2/7/132741508/987569.pdfIn PDF document text
    • http://files.sudburyrocksmarathon.com/uploads/1/3/1/4/131483143/0845ecd8d1de.pdfIn PDF document text
    • http://files.dyw-edinmideast.com/uploads/1/3/1/4/131454270/bc8986b.pdfIn PDF document text
    • http://files.jameslpoole.com/uploads/1/3/0/7/130775490/9335446.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3550/0439/files/zitosajijima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4937/6149/files/putomor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/medicinal_leech_therapy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/66484874535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/so_what_pink_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9751/files/63209753885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5651/2667/files/jabukovuniref.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/17998731410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/xamadabetutefegujosowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/3ds_max_character_creation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2074/5893/files/13864960668.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 5408 bytes
SHA-256: 2252f4fd236bb4004d3b408b40479dbe6a001a6afa498c0c4ee51c025eb2ccb0
font_01_sfnt_off000073a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A7 9740 bytes
SHA-256: 8c68ef8412e2730bace9b4f4269cd4654e298e410dd962306a25de9bec6326c7
font_02_sfnt_off000094d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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